Tree-ring isotopic imprints on time series of reproductive effort indicate warming-induced co-limitation by sink and source processes in stone pine.

Increasing evidence indicates that tree growth processes, including reproduction, can be either sink- or source-limited, or simultaneously co-limited by sink and source, depending on the interplay between internal and environmental factors. We tested the hypothesis that the relative strengths of photosynthate supply and demand by stem growth and reproduction create variable competition for substrate that is imprinted in the tree-ring isotopes (C and O) of stone pine (Pinus pinea L.), a masting gymnosperm with large costs of reproduction, under warming-induced drought.

Novel allosteric PARP1 inhibitors for the treatment of BRCA-deficient leukemia.

The successful use of PARP1 inhibitors like olaparib (Loparza) in the treatment of BRCA1/2- deficient breast cancer has provided clinical proof of concept for applying personalized medicine based on synthetic lethality to the treatment of cancer. Unfortunately, all marketed PARP1 inhibitors act by competing with the cofactor NAD and resistance is already developing to this anti-cancer mechanism. Allosteric PARP1 inhibitors could provide a means of overcoming this resistance.

Camptocormia secondary to polymyositis.

Camptocormia is a postural affliction characterised by abnormal flexion of the thoracolumbar spine, which appears upon standing, increases with walking, and disappears in the supine position. Only five cases of camptocormia secondary to idiopathic inflammatory myopathies have been described in the literature. In this case report, we describe the case of a male patient 67 years of age who suffered from polymyositis for 18 years, which was associated with manifestations compatible with camptocormia.

Thymus mastichina: chemical constituents and their anti-cancer activity.

The cytotoxicity-guided study of the dichloromethane and ethanol extracts of Thymus mastichina L. using the HCT colon cancer cell line allowed the identification of nine compounds, sakuranetin (1), sterubin (2), oleanolic acid (3), ursolic acid (4), lutein (5), beta-sitosterol (6), rosmarinic acid (7), 6-hydroxyluteolin-7-O-beta-glucopyranoside (8), and 6-hydroxyapigenin-7-O-beta-glucopyranoside (9). All compounds were tested for their cytotoxicity against the HCT colon cancer cell line.

Convenient synthesis of 3-vinyl and 3-styryl coumarins.

A variety of 2-hydroxy aldehydes on reaction with 3-butenoic acid afford in a one-pot reaction the corresponding 3-vinylcoumarins. As expected, extension of the delocalized π-electron system accomplished by Heck coupling reactions with aryl halides results in an increased fluorescence of the compounds whose applicability is yet to be established.